Chuck-operating device.



N0. 694,!89. Patented Feb. 25, I902.

,J. C. POTTER &. J. JOHNSTON.

CHUCK OPERATING DEVICE. (Application fild June 20, 1900.

(No Model.)

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UNITED STATES PATENT Fries.

JAMES C. POTTER AND JOHN JOHNSTON, OF PAWTUCKET, RHODE ISLAND, ASSIGNORS TO POTTER AND JOHNSTON MACHINE COMPANY, OF PAW- TUOKET, RHODE ISLAND, A CORPORATION OF RHODE ISLAND.

CHUCK-OPERATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 694,189, dated February 25, 1902.

3 Application filed June 20, 1900. Serial No. 20,966. (No model.)

To all whom it may concern: used heretofore consisted of a bifurcated le- Be it knownvthat we, JAMES C. POTTER, a ver pivoted on a fixed part of the machine citizen of the United States, and JOHN JOHN-' and extending transversely to the axial cen- STON, a subject of the King of GreatBritain, ter of the chuck-arbor. Such a lever ob-.

5 both residing at Pawtucket, in the county of structs the necessary free passage along the Providence and State of Rhode Island, have side of the machine and cannot under the invented a new and useful Improvement in usual'condition's be used of a length to in- Ohuck-Operating Devices, of which the folcrease the leverage or the power exerted. lowing is a specification. When our operating mechanism is applied 0 This invention has reference to an improv'eto a lathe-chuck, we secure in the preferred ment in shipper-operating mechanism, and is form the bed I), provided with the brackets particularly applicable to and designed for b b at the opposite ends, to the bolster b and operating a lathe-chuck inwhich the dogs or rigidly clamp the same to the opposite sides jaws are actuated by means of longitudinallyof the bed a by screws connecting the clamp- 15 moving rack-bars similar to the lathe-chuck bar b with the bolster b". The shaft b is shown and described in United States Patent supported in suitable journal-bearings on the No. 635,976, of October 31, 1899, for lathebed I) and has near the oppositeend bearings chucks. the pinions b 5 secured to the shaft. On

The invention consists in the peculiar and the operative side of the lathe the hand-lever 2o novel construction and the combination of the 6 having the bracket b extending from the parts whereby a rock-shaft actuates levers boss of the hand-lever, is secured to the shaft engaging with the shipper-sleeve, as will be 17 On the two brackets 17 b the levers b b more fully set forth hereinafter. are pivotally supported. These levers are The object of the invention is to operate the provided at their lower ends with the segmen- 2 5 shipper-sleeve and the parts connected theretal gears b", which engage with the pinions with with increased force and secure greater b b on the shaft 1). The levers b b have clamping power in the chuck, clutch, or simipivotally connected with their upper ends the lat device to which the invention is applied. shoes 79 19 which enter into the groove a on In the drawings we have shown the ship-' the. shipper-sleeve a at the opposite sides.

0 per mechanism applied to a lathe-chuck con- The stop-pin 0, having an enlarged head at structed in accordance with the invention the inner end, is placed into the hole a in the 80 shown and described in United States Patent bed b, in which the coiled spring 0 bears No. 635,976, granted to us October 31, 1899. against the head of the pin 0. The follower Figure 1 is a side view of a lathe-chuck pro- 0 in which the stop-pin 0 moves with a slid- 35 vided with our improved operating mechaning fit, is screwed into the screw-threaded porism. Fig. 2 is a front view of the lathe-chuck tion of the bed I) surrounding the hole a and and actuating mechanism, shown partly in retains the stop-pincin the path of thebracket section. 67; but the pin 0 may be pushed inward against In the drawings, a indicates the bed of a the spring 0 to allow the bracket 11 to pass 40 lathe; a, the head-stock; ta the chuck; a the by the stop-pin.

shipper-sleeve, and a the peripheral groove In using our improved chuck-operative 0 on the shipper-sleeve. mechanism the operator, standing usually on In Fig. 1 the shipper-sleeve a and groove the side of the lathe on which the hand-lever a, as Well as the operating mechanism, are b is located, has this lever Within convenient 45 shown in solid lines in the operative position, reach, while the hand-lever does not obstruct when the dogs 0. 0. of the chuck hold the work the free passage of the operator to the driv- 5 or part inserted between the dogs and in ing-pulleys, usually at the end of the headbroken lines when the dogs are released. The stock. With the parts in the positions shown usual means. of operating the shipper-sleeve in solid lines in the drawings, with the work bracket to pass by the same.

clamped between the jaws, the operator to release thework moves the hand-lever intothe position shown in broken lines, thereby rocking the shaft 17 and bringing the bracket 1) in contact with the stop-pin c.

When for the purpose of the adjustment of the dogs the shipper-sleeve and parts connected therewith-such as the rack-bars of United States Patent No. 635,976, above referred toare required to be moved farther back, the stop-pin c is pushed in to allow the With the parts constructed in the proportions shown in the drawings the power exerted on the hand-lever is multiplied about ten times and is exerted with tenfold force on the shipper-sleeve and the parts connected therewith. A clutch or chuck or similar devices, such as are used to connect and disconnect pulleys, may be operated by our improved mechanism and the shipper-sleeve while running with increased power.

Having thus described our invention, We claim as new and desire to secure by Letters Patent 1. In a mechanism for operating a chuck, clutch or similar device, the combination with a shipper-sleeve, of a rock-shaft, pinions on the rockrshaft, and a hand lever on the rockshaft, of levers having segmental gears on one end, connecting with the pinions on the rock-shaft, and shoes engaging with the'shipper-sleeve on the other end, as described.

2. In a chuck-operating mechanism, the combination with the shipper-sleeve, of a rock-shaft extending transversely to the shipper-sleeve, a pinion on the rock-shaft, and a lever actuated by the pinions on the rockshaft' and connected with the shipper-sleeve, as described.

3. In achuck-operating mechanism, the

combination with the shipper-sleeve, of a rook-shaft, a handlever on the rock-shaft, levers connected with the opposite sides of the shipper-sleeve pivoted on a fixed part of the machine, and mechanism for operating the levers through the rock shaft, as described. I

4. In combination with the shipper-sleeve on the chuck, of ashaft extending transversely to the shipper-sleeve, levers supported on fixed bearings on each side of the shipper-sleeve, connections between the levers and the shipper-sleeve, means for operating the shaft, and mechanism connecting the shaft with the levers, whereby the power exerted to rock the shaft is transmitted with increased force to the shipper-sleeve, as described.

5. In a lathe-chuck, the combination of the following instrumentalities: ashipper-sleeve, levers pivotally supported on fixed bearings on each side of the shipper-sleeve, shoes engaging with the shipper-sleeve pivotally su pported on the levers, segmental gears on the levers, a transversely-extending shaft, pinions on the shaft, a hand-lever on one end of the shaft, a bracket on the hand-lever, and a stop-pin; whereby the force exerted onthe hand lever is transmitted to operate the chuck.

6. In a lathe-chuck, the combination with the frame of the lathe and the shipper-sleeve on the chuck, of the bed 5, the stop-pins c c in the bed, and the brackets b b on the'bed, of the shaft 12 journaled in bearings on the bed I), the pinions b b on the shaft 1), the levers b b pivotally supported on the brackets b b, the shoes b b pivoted to the levers b b the segmental gears on the levers b b in engagement with the pinions 19 12. and the hand-lever I) having the bracket 19 as described.

7. In a chuck-operating mechanism, the combination of jaws, racks and pinions for operating saidjaws, a shipper-sleeve to which said racks are connected, a lever having one end in engagement with said shipper-sleeve and having on' its other end a segment, a pinion engaging said segment and mounted on a fixed journal and having a lever by which it can be revolved, substantially as and for the purpose described.

8. In a chuck-operating mechanism, the

combination of alever mounted on a fixed JAMES C. POTTER. JOHN JOHNSTON.

YVitnesses:

J.,A. MILLER, J r., A. E. .HAGERTY. 

